Measure the voltage at the coil, try grounding the coil and see if it fires at full strength.
A very good point here that I over looked.
I spoke to Wotto last week and the coil measures zero ohms out of circuit = Bizarre !
He has ordered another coil.
Zero ohms out of circuit usually means that the diode has shorted, or if no diode then shorted turns inside the coil... but this would lead to a blown transistor also.
The coils works, although pissweak... Hmmm.
